fix(cli): isolate build.rs to not modify source directory

fix "Source directory was modified by build.rs during cargo publish. Build scripts should not modify anything outside of OUT_DIR."

.gitignore

@@ -2,6 +2,3 @@
 .vscode
 .idea
 Cargo.lock
-
-# build script artifacts
-cli/LIBRARY_VERSION

cli/Cargo.toml

@@ -33,4 +33,4 @@ version = "4"
 features = ["derive"]
 
 [build-dependencies]
-cargo_toml = "0.16"
+cargo_toml = "0.17"

cli/build.rs

@@ -16,5 +16,9 @@ fn main() {
         .as_ref()
         .unwrap();
 
-    std::fs::write(PathBuf::from_iter([ROOT, "LIBRARY_VERSION"]), version).unwrap();
+    std::fs::write(
+        PathBuf::from_iter([std::env::var("OUT_DIR").unwrap(), "LIBRARY_VERSION".into()]),
+        version,
+    )
+    .unwrap();
 }

cli/src/main.rs

@@ -15,7 +15,7 @@ use std::ffi::OsString;
 
 #[derive(Parser)]
 #[clap(name = "Cambridge Pseudoassembly Interpreter")]
-#[clap(version = concat!("v", env!("CARGO_PKG_VERSION"), "\nCambridge Pseudoassembly v", include_str!("../LIBRARY_VERSION")))]
+#[clap(version = concat!("v", env!("CARGO_PKG_VERSION"), "\nCambridge Pseudoassembly v", include_str!(concat!(env!("OUT_DIR"), "/LIBRARY_VERSION"))))]
 #[clap(author = "Saadi Save <github.com/SaadiSave>")]
 #[clap(about = "Run pseudoassembly from Cambridge International syllabus 9618 (2021)")]
 enum Commands {